In addition to putting in a waiver claim on Byrd, the Pirates also claimed Buck before the trade, Adam Rubin of ESPN New York writes (on Twitter).

The player to be named the Mets are set to receive will be a "solid" one, and that could make an already-strong trade even better for New York, says ESPN's Keith Law (Insider-only). But Law also calls the trade a "truly all-in move" from the Pirates' perspective, noting that Byrd represents an enormous upgrade over the Bucs' right fielders, who have been dreadful this year.

Byrd is "a good get" for the Pirates, Fangraphs' Jeff Sullivan writes. Sullivan notes that, based on what we knew entering the season, it would have been strange to learn that the Pirates were still looking for upgrades in late August, and just as strange that the aging Marlon Byrd would constitute an upgrade.

In Herrera, the Mets may be getting an "offensive-oriented second baseman," Matt Eddy of Baseball America writes. Eddy also notes that Herrera could hit for decent power to go with a good on-base percentage, and that appears likely to stick at second base.

They may have just traded him, but the Mets may have interest in pursuing Byrd again when he becomes a free agent this winter, Andy Martino of New York Daily News writes (on Twitter).

Martino also tweets that the Mets are unlikely to make any more trades this month.